Fingers free, toes webbed .......... _Rana_, p. 249. Fingers and toes more or less webbed. Always with discs .......... _Rhacophorus_,* p. 245. Two fingers opposed to the others. Africa .......... _Chiromantis_,* p. 244. _b_. Outer metatarsals united, or separated by a groove only. Omo- and meta-sternum with a bony style .......... _Cornufer_, p. 243. Omo- and meta-sternum slender and cartilaginous. Ceylon, 2 species .......... _Nannophrys._ Mozambique .......... _Phrynopsis boulengeri._ _B_. Without vomerine teeth. _a_. Palaeotropical. α. Tongue narrow and entire. No discs. Outer metatarsals webbed. India, 3 species .......... _Oxyglossus_. β. Tongue oval, feebly nicked. Large discs. Solomon Islands .......... _Batrachylodes vertebralis._ Karin Hills .......... _Phrynoderma asperum._ γ. Tongue deeply notched. Outer metatarsals united by a web. Discs none or very small. Africa, 3 species .......... _Phrynobatrachus._ Borneo .......... _Oreobatrachus baluensis._ With regular discs. Number of phalanges normal. India, 5 species .......... _Micrixalus._ With an extra, interpolated phalanx. India, 18 species .......... _Ixalus._* Two fingers opposed to the others. Karin Hills .......... _Chirixalus doriae._* δ. Tongue heart-shaped. Outer metatarsals united. Fingers and toes free, tips blunt. Africa, 8 species .......... _Arthroleptis_, p. 242. Fingers and toes more or less webbed, with regular discs. Africa and Madagascar, 23 species .......... _Rappia._* {242}_b_. Neotropical. Metasternum small, cartilaginous or membranous. With discs. 1. With a pair of dermal scales on the discs. Omosternum with a bony style. Tongue heart-shaped. Ecuador, 2 species .......... _Hylixalus._ Toes free. 5 species .......... _Phyllobates_, p. 242. Tongue entire. Ecuador and Colombia, 3 species .......... _Prostherapis._ Omosternum cartilaginous. Ecuador .......... _Phyllodromus pulchellus._ 2. Discs without scales. Omosternum absent. Colombia .......... _Colosthetus latinasus._